因此,很多学生课间也坐在教室里用功,但学习效率和成绩并不理想用英语翻译

因此,很多学生课间也坐在教室里用功,但学习效率和成绩并不理想用英语翻译

Therefore, many students are sitting in a classroom between classes hard, but the learning efficiency and performance is not satisfactory

therefore many students sitting in a classroom at the recess time ，study hard , but the learning efficiency and performance is not satisfactory

因此：therefore

坐在教室：sitting in a classroom（应该是表示一种状态）

课间：at the recess time（这个词组有中场休息的意思）；a break（这个应该比较常用。）

效率：efficiency

performance:表现，在这里指的就是成绩。当然你也可以achievements，score，an academic record等等。。

不理想：not satisfactory（不让人满意）

THEREFOR ，MANY STUDENTS EVEN KEEP LEARNING During the class interval ，BUT THE EFFICIENCY AND SCORES ARE NOT SO GOOD